<template>
  <div class="effect-button">
    <div class="button-effect">
      <span></span>
      <span></span>
      <span></span>
      <span></span>
      戳我！！
    </div>
</div>
</template>

<style scoped>
.effect-button{
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  /* background: #031321; */
  font-family: consolas;
}
.button-effect{
  position: relative;
  display: inline-block;
  padding: 15px 30px;
  color: #2196f3;
  text-transform: uppercase;
  letter-spacing: 4px;
  text-decoration: none;
  font-size: 24px;
  overflow: hidden;
  transition: 0.2s;
  user-select: none;
}
.button-effect:hover {
  color: white;
  background: #2196f3;
  box-shadow: 0 0 10px #2196f3, 0 0 30px #2196f3, 0 0 60px #2196f3;
  transition-delay: 1s;
}
.button-effect span{
  position: absolute;
  display: block;
}
.button-effect span:nth-child(1){
  top: 0;
  left: -100%;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg,transparent,#2196f3);
}
.button-effect:hover span:nth-child(1){
  left: 100%;
  transition: 1s;
}
.button-effect span:nth-child(2){
  top: -100%;
  right: 0;
  width: 2px;
  height: 100%;
  background: linear-gradient(180deg,transparent,#2196f3);
}
.button-effect:hover span:nth-child(2){
  top: 100%;
  transition: 1s;
  transition-delay: 0.25s;
}
.button-effect span:nth-child(3){
  bottom: 0;
  right: -100%;
  width: 100%;
  height: 2px;
  background: linear-gradient(27deg,transparent,#2196f3);
}
.button-effect:hover span:nth-child(3){
  right: 100%;
  transition: 1s;
  transition-delay: 0.5s;
}
.button-effect span:nth-child(4){
  bottom: -100%;
  left: 0;
  width: 2px;
  height: 100%;
  background: linear-gradient(360deg,transparent,#2196f3);
}
.button-effect:hover span:nth-child(4){
  bottom: 100%;
  transition: 1s;
  transition-delay: 0.75s;
}
</style>